Improvement in devices for connecting blocks of wood pavements



FFICE.

IMPROVEMENT IN DEVICES FOR CONNEOTING BLOCKS OF WOOD PAVEMENTS.

Speeilication forming part of LettersPatent No. 117,802, dated August 8, 1871.

To all @rhomz't may concern:

Be it known that I, DAvID H. MULFORD, of Saratoga Springs, in the State of New York, ha-ve invented a new and useful Improvement in the Construction of NVooden Pavement, and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing making a part of this specification, in which- Figure l represents a section of pavement composed of nine blocks of wood, so laid as to break joints, and so constructed as to form continuous recesses between the rows of blocks for the reception of concrete, broken stone, or sand and gravel, and also showing the manner of joining and holding` the blocks together by the use of clamps or hooks, represented by Fig. 2, and indicated by letters B B B, Fig. l, the dotted lines B B on the ends of the blocks A A indicating the position of the clamps or hooks in the nnished pavement. The openings C C C in the ends of the. blocks A A A indicate narrow grooves cut in the bottoms ofthe blocks across their entire width, about three-fourths of an inch in depth, and about one inch from the edge ofthe blocks. Fig. 2 represents an iron or wire clamp 0r hook, which may be made of any desired length and of any desired size of wire-gauze, and to be used, as indicated in Fig. 1, to clamp or anchor the blocks together.

Similar letters of reference indicate corresponding parts in the several gures of this drawing.

To enable those skilled in the art to fully understand and to construct a pavement upon my improved plan and invention, I will proceed to describe it, and explain the mode of constructing it.

I prepare the blocks of wood to be used in my pavement by cutting` a shoulder or seat in each block for the purpose of forming recesses between the rows ot' blocks for the reception of concrete or sand and gravel, as indicated at D D D in Fig. l, and then cut, with a saw or otherwise, a groove about a quarter of an inch wide and about three-quarters of an inch deep, as indicated at C C C, in the bottom of each block, and about one inch from the edge thereof, for the reception of the lower end F of the clamp or hook represented by Fig. 2. In the face of each block, as represented by B B B, I drive the upper end E of a clamp or hook, Fig. 2, so that the lower part will just nicely hook and lit into the groovev C ofthe next or following block, as indicated by lie dotted lines B B in the ends of the blocks A The blocks being thus prepared and the clamps or hooks adjusted, and the street or road-bed properly graded, I proceed to lay the blocks in the manner represented in Fig. l-that is, I lay the iirst row of blocks entirely across the street, from one eurbstone to the other, with the faces or sides of the blocks having the clamps or hooks inserted in them in the direction of the ground to be paved, and then lay the next row so that the lower ends E of the clamps or hooks B will catch in the groove C, and so continue to lay one row after another, anchoring and clamping each row of blocks to the one adjoining it, thus forming a pavement the blocks ot' which shall be completely locked or hooked and clamped together and supporting each other. rIhe recesses between the rows of blocks I fill, in any ot' the ordinary methods, with sand and gravel or broken stone, Ste., and with or without the addition of tar or pitch, according t0 the desire or wishes of the parties orderin g the work.

Having thus described my invention. what I claim as new, and desire to secure by Letters Patent, is as follows:

rIhe hook shown in Fig. 2, when. applied to the I blocks, as shown in the upturned point F, fitting in the groove C in the bottom of the blocks, as set forth.

D. H. MULFORD.

lVitnesses M. A. Monsn, J emv COOPER. 

